You can contact the IRS directly, if it has been more than 21 days since your return was accepted. I have listed the IRS phone number below and instructions on how to get through to a representative.
Please also see this information, why your return may be taking a little bit longer to process with the IRS.
Even though the IRS issues 9 out of 10 tax refunds within 21 days, it's possible your return may require additional review and take longer to process.
For some taxpayers, PATH Act requirements and other identity-protection safeguards implemented by the IRS may account for longer wait times. (Earned Income Tax Credit (EIC) and/or Additional Child Tax Credit)
Other things that can delay your refund include but are not limited to: