Should I call the IRS if my return has made no changes and was accepted on March 16th?

No. You will never get through. Give it a little more time. The IRS is extremely backed up.  IRS

 

Claiming the following credits may delay refunds past 21 days:

• Earned Income Tax Credit (EITC) and/or an Additional Child Tax Credit (CTC)
• Recovery Rebate Credit (only if there is a mistake in the amount)

Use the following articles to help your customer understand why refunds may take longer than 21 days.

 

 

Other things that can delay your refund include, but are not limited to:

• Liens, back taxes, or refund offsets

• Errors, inconsistencies, or missing information
• Identity fraud
• Form 8379, Injured Spouse Allocation, which can take 11-14 weeks to process

Also, if you chose direct deposit, your financial institution may need another day or two to post the refund to your account, so keep that in mind.

Related Information:

• What if my IRS refund is taking longer than 21 days?
• When will I get my IRS tax refund?
• Some federal refunds are delayed due to the PATH Act

 

 

this is from the IRS Tax Advocate Website

taxpayers are experiencing more refund delays this year than usual. Typically, the IRS processes electronic returns and pays refunds within 21 days of receipt. However, the high volume of 2020 tax returns being filed daily, backlog of unprocessed 2019 paper tax returns, IRS resource issues, and technology problems are causing delays. This is due, in part, to the IRS’s need to manually verify large numbers of Refund Recovery Credits (RRCs), as well as Earned Income Tax Credit (EITC) and Advance Child Tax Credit (ACTC) 2019 adjusted income lookback claim