Why didn’t I receive the full amount of my federal return? It was short about $165?

Is the amount sent/issued by the IRS the same as the refund amount shown on your federal tax return Form 1040 Line 35a? - https://www.irs.gov/refunds

If not, then go to this IRS website for information on reduced refunds - https://www.irs.gov/taxtopics/tc203

Or did you request to have the TurboTax account fees paid from the federal tax refund?  If so -

Have you factored in the TurboTax account fees and the TPG service charge of $39 plus any applicable sales tax?
Review your TurboTax account fees -
Sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents click on View Order Details