Should I submit my federal return again?

No their computers keep crashing if you got something saying it was accepted you dont need to refile.

I would NOT refile, especially if you have confirmation that it was received. Otherwise, I think you run the risk of it being flagged and held for even longer

It is just taking longer to get returns you need to be patient.

Update: We are aware that some taxpayers who have filed electronically and received an acknowledgement from the IRS are concerned when they visit "Where's My Refund" and are told that we have no information regarding their return. This is a temporary situation, and we expect to resolve the matter in a few days. At that time, taxpayers will be able to get an expected refund date when they visit "Where's My Refund."

If a taxpayer received an acknowledgment message that their e-filed tax return has been received, they can be assured that the IRS has the tax return even though "Where's My Refund" does not reflect that. Taxpayers should not call the IRS unless specifically directed by "Where's My Refund," as there is no new information to give them.

We expect the vast majority of tax refunds to continue to be issued within the historical range of 10 to 21 days. The IRS is taking steps to update information so that Where's

^^^^From the IRS website

IDK, I always use an accountant