There's nothing to "sync" per-se. But you can make the .tax2020 file on your computer match exactly what you filed with the IRS. That is, assuming you know the details for an absolute fact.
Simply enter data "EXACTLY" as filed with the IRS. Then accept the option to "print and file" and actually *do* print the tax return so that program will "think" you mailed it. At that point, you're done. But understand there will be no "syncing" with anything online.
