Is there a bug in the software? I'm unable to get pass the review section. it keeps telling me to fill out Sch SE-T Max deferral line 18. but it wont let me continue.

The SE-T is self-employment taxpayer form. Line 18 is for the amount of money earned between March 27, 2020 and December 31, 2020. The self-employment tax on that portion can be postponed for payment in the following year. You can postpone that portion of your taxes due with no penalties or interest. 

Since you have a negative number, you can try to leave the entry blank.  If that doesn't work, then to get past this you need to update Schedule SE-T. 

The process: delete Sch SE-T, take a quick run through of the self-employment to recalculate Sch SE-T, and then turn off the Max Deferral. 

To do this in TurboTax, follow these steps: 

First, delete Sch SE-T that applies by following these steps: 

1. From the left menu, select Tax Tools. 

2. Select Tools. 

3. Scroll to Delete a Form. 

4. Scroll to Sch SE-T, select Delete, confirm the deletion. 

Next, to replace Sch SE-T, return to the self-employment income & expenses interview in the Income & Expenses section and select Edit/Add. 

1. Select Edit for your business. 

2. Scroll down to Done so that the Sch SE is recalculated.  

3. Finish any other questions in the self-employment interview and click Continue.  

Lastly, revisit the section for the Self-employment tax deferral entry: 

1. Return to the Deductions & Credits section. 

2. Scroll to Tax relief related to COVID-19 and Show More. 

3. Select Self-employment tax deferral and select Revisit. 

4. Answer Yes at the next screen to get back to Let's start by getting your eligible income. 

   1. If you do not want to defer any self-employment income, "Enter your eligible self-employment income" should be blank. 

      1. Select Continue. 

   2. At Tell us how much you'd like to defer, "Enter amount" should be blank. 

      1. Select Continue. 

5. Scroll down and select Wrap up Tax Breaks and Continue. 

6. Run through the Federal Review again.