Retirement tax questions

Both replies are genius! I used the manual worksheet to calculate what the remaining basis aka "balance of cost to be recovered" using 16 months so I had a target number to know when turbo tax was making the correct calculation. I created two 1099 R forms in Turbo Tax one for four months and the additional one for 12 months. I had to fiddle around with it in TurboTax a couple of times because the final "balance of cost to be recovered" line wasn't quite right. It finally matched once I typed in Turbo Tax that the second annuity started in the prior year so I could manually enter the previous amount recovered from the first 1099 R entered. Everything worked out great. Thanks!!