The IRS is seriously backlogged due to all the new tax laws and extra stimulus filings, as well as unprocessed 2019 returns left over from the COVID shutdown. In addition, the Where's My Refund site has been erratic and unreliable. But if TT told you that the IRS Accepted your efiling for processing, then the government has it. (Approved is a later step, but TT receives no further updates once a return is Accepted.) Unfortunately, contacting the IRS will not speed things up. Lots of other folks are still waiting (some for 8 weeks or longer), so please continue to be patient. Also see:
Why Tax Refunds Are Taking Longer Than Usual (forbes.com)
Called the IRS lately? Agency struggles to hire customer service reps despite pandemic unemployment ...
