I just mailed my 1040 tax form with my signature and date because I wasn’t able to esign it. When will I be notified that you received it ?

TurboTax receives no tax returns.  The Federal tax return is sent to the IRS and they do not acknowledge receipt of a tax return.
If your tax return was filed with a tax refund you will need to wait for about 4 weeks before checking the IRS website for the refund status - <a rel="nofollow" target="_blank" href="https://www.irs.gov/refunds">https://www.irs.gov/refunds</a>

If you have mailed your tax return the IRS says that you can start tracking it 4 weeks after mailing your paper return. You can track your federal refund on the IRS website by clicking on the following link: https://www.irs.gov/refunds