You may have a second account with an unfinished return in it and the program is alerting you to finish the return ... so if you are SURE your return has been filed and accepted you can ignore the unwarranted reminder emails.
If the status of the tax returns on the TurboTax Tax Home web page indicates
Accepted
, then your tax returns were e-filed - https://myturbotax.intuit.com/
You may have more than one account on TurboTax, so the email may be referencing the other account. Disregard the email if your tax returns are
Accepted
.
If accepted by the IRS use the federal tax refund website to check the refund status - https://www.irs.gov/refunds
If accepted by the state use this TurboTax support FAQ to check the state tax refund status - https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund
After the tax return has been Accepted by the IRS (meaning only that they received the return) it will be in the Processing mode until the tax refund has been Approved and then an Issue Date will be available on the IRS website.
See this IRS website for federal tax refund FAQ's - https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions