that increase could be due to the enactment of the ARP Act especially if
1) you filed with the other provider before it was signed into law and
2) you filed before the other provider could update its software and
3) you reported unemployment compensation or repayment of excess Obamacare premiums received
then the IRS does not want an amended return. it says it will adjust those types of returns. when refunds will start to be issued for this is unknown.
no guarantee you'll get back what TurboTax says because the reason for the difference could be errors you made in doing the return in TurboTax as opposed to what was done in the other software. It's not even clear whether you paid to have someone do your return for you or you did the return yourself using other software.
if it's where the paid preparer made an error they should amend for free.
