Retirement tax questions

I have a similar problem.  I am 56 and inherited an annuity (NOT a retirement account) from my 100-year-old grandmother.  This was not an IRA or other retirement account (they were farmers, so never had "retirement plans" as such).   I received a 1099-R for the annuity.  Do I call this “Private Distribution”, or “none of the above”?   Will I pay higher taxes because I am continuing to receive these non-qualified annuity payments?  (TT asked if I rolled them over to another retirement account or used them for other purchases — a red flag in my book).