Retirement tax questions

I really appreciate your patience in answering my questions.  I understand your last set of instructions, but the issue is that I did a direct rollover from a traditional 401(k) to an existing Roth IRA at another institution, so I only received one 1099-R form (from the sending institution, the Thrift Savings Plan).  That is what seems to be the problem - that I didn't do a direct rollover to a traditional IRA first and then do the conversion, since that was what TSP  instructed me to do at the time (but now they've updated their instructions to do the two-step process instead).   Since I only have one 1099-R to refer to, and I've already entered that per the instructions, what should do I next to report this properly?