A terminal apparatus receives a DCI format used for scheduling of a PDSCH, and transmits HARQ-ACK information in a slot n. In a case that a higher layer parameter is given, for a PDSCH group g, a monitoring occasion for PDCCH corresponding to a DCI format satisfying a condition is included in a set of monitoring occasions for PDCCH for the slot n. Based at least on the set of monitoring occasions for PDCCH for the slot n, the HARQ-ACK information is generated. The condition includes the following: condition 1 is that the HARQ-ACK information corresponding to the PDSCH scheduled by the DCI format is triggered to be transmitted in the lot n, and condition 2 is that the PDSCH group g is indicated by a PGI field included in the DCI format.