The IRS recommends that after 21 days from when your return was accepted to call the IRS and speak to a tax representative. Calling will not create a delay in your refund, so do not worry about that.
The IRS issues most refunds in less than 21 days, although some require additional time. You should only call if it has been:
- 21 days or more since you e-filed
- 6 weeks or more since you mailed your return, or when
- "Where's My Refund" tells you to contact the IRS
Do a 2019 Paycheck Checkup and adjust your withholding with your employer now to make sure your withholding is right for next year.