No one at TT knows if the IRS is sending you a check. We know that the IRS has identified some people who filed 2021 returns with line 30 blank and that some of those folks were actually eligible for the credit, so the IRS is sending out the 3rd EIP to them. If anyone could claim you as a dependent for 2021 you are not eligible. If you actually received the $1400 before you filed your tax return, that would be another reason for line 30 to be blank. Check your online account with the IRS to see what is shown.
https://www.irs.gov/payments/your-online-account
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
