A person who forgot to request tal umatar in the bracho of Bareich Aleini has to request it in shomea tefila. If he already started Retzei, he goes back to Bareich Aleini.
Question: If one already started Retzei, and instead of reverting to Bareich Aleini, he reverted to the bracha of Shema Koleinu…. shomea tefilla and requested tal amateur there, does he repeat?
He doesn’t have to repeat SE.
Be’er Sarim- (New version) Likutim 41-2, brought in Shegiyos Mi Yavin 13 ftnt.17, (other’s say it is questionable)