Do you remember what specifically changed on Schedule C? I'm working on mine now and want to make sure I get it right.

The main differences weren't dramatic, but there were some COVID-related options that existed only for 2020 returns. For example, there were special provisions for the Employee Retention Credit and paid sick/family leave credits that appeared on that year's forms. The core expense categories stayed the same (advertising, car expenses, insurance, etc.), but some of the instructions and limitations were different due to pandemic relief provisions. Your best bet is to download the actual 2020 Schedule C form and instructions directly from the IRS website rather than using any current year references. That way you'll be working with the exact form as it existed then.

Not to mention the possibility of having to amend your state return too depending on where you live. Some states require you to file a state amendment if you change your federal return.

How quickly should I do the conversion after contributing? Mine sat for about 2 weeks and earned like $12 in interest. Is that going to cause issues?

A couple weeks is totally fine, and $12 in interest isn't going to cause major issues. You'll just need to pay taxes on that $12 when you do your 2024 taxes (since that's when the conversion happened). The real problems happen when people contribute to a traditional IRA and then wait months or even a year before converting, allowing significant earnings to accumulate. Some people have their traditional IRA in investments that could grow substantially before conversion, creating a larger tax bill.

I've used TurboTax for backdoor Roth for the past 3 years. It works but is a bit confusing. When it asks if you want to deduct your traditional IRA contribution, make sure to say NO. Then it will guide you through the Form 8606 for non-deductible contributions. The next year, it'll help you report the conversion with the 1099-R.

Doesn't the tiebreaker rule mean that if two people can claim a child, the person with the higher AGI gets the claim? Or is that only when both people are equally eligible?

The tiebreaker rules only come into play when BOTH people are eligible to claim the dependent under all the qualifying child or qualifying relative tests. They're essentially the "last resort" when two people legitimately could claim the same dependent. In most disputes like this, the IRS determines only one person actually qualifies under the support and residency tests. If the child lived with the grandparent for more than half the year and the grandparent provided more than half the support, then the tiebreaker rules won't even be needed - the other person simply doesn't qualify regardless of their AGI.

You don't need proof for all that. IRS Publication 501 clearly states that for the support test, you only need to show you provided MORE than half of the child's total support for the year. You don't need to document every single expense.

ur right but in an audit they ask for everything. my cousin had to make a spreadsheet showing all expenses for the kid and who paid what. better to have too much proof than not enough! in a normal year ya don't need all that but when someone else also claimed the same kid its different. they check everything super carefully.

That's not a bad approach for quick budgeting! Do you have any tips for how to determine the withholding percentages for each scenario? Are you just using the actual percentages from past paychecks?

I just look at my past paystubs and calculate the actual withholding percentage for each category. So I'll find a few examples of 40-hour weeks, average the withholding percentage, and use that. Same for the other scenarios. It's not perfect, but it gets me close enough for budgeting. The key is to categorize your past paychecks based on hours worked and then find the patterns. Over time, you'll see that the percentages are fairly consistent within each band of hours.

The IRS calculator is good for annual planning but it's not great for weekly variations. It assumes consistent income throughout the year which is exactly what OP doesn't have.

This is super helpful! I had no idea about those limitations on education credits when filing separately. I think we'll definitely need to calculate it both ways. Do you know if standard free tax sites can show both scenarios accurately or do we need to use something more specialized?

Most of the free tax sites can show you both scenarios, but you might need to create two separate tax returns (just don't file both!). Start one return as married filing jointly, note the refund/amount owed, then start a new return as married filing separately and compare. The standard sites aren't great at explaining the financial aid implications though. For that, you might want to talk to your wife's school financial aid office directly. They can often run projections showing how different income levels would affect her specific aid package. Some schools even have financial counselors who specialize in these situations.

Yes, FAFSA made significant changes recently! Starting with the 2024-2025 FAFSA, they're using what's called the Student Aid Index (SAI) instead of the Expected Family Contribution (EFC). There are also changes to whose income is considered in the formula.