First, you can't file until late January. Don't you need to receive W-2s etc.
Did you finish the interview process about the stimulus near the end of the interview? I suspect that $1200 is the stimulus payment, which if you already received it, then you didn't finish the interview process!
don't be in such a hurry to file - if you don't receive the 2nd stimulus via mail / direct deposit, you'll have to get it through your tax return; filing quickly could mean an amendment and months of wating!!
If you are seeing the $1200 in the recovery rebate credit--- that will be part of your tax refund. When you file your 2020 return the IRS will process that amount as part of your refund. Nothing you enter into your 2020 return software is transmitted to the IRS until you actually file your tax return. The IRS will not be accepting 2020 returns until the end of January.