The IRS themselves have issued instructions to use $1 for people who did not file a tax return, but did use the non-filing stimulus tool last year.
Could be an issue that their (or Turbotax's) computer system isn't set up quite right for folks who were single in 2020, but married in 2021, and have this type of complicated AGI situation.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
