Tanya submitted a letter of resignation to her employer on April 2 of the current...

Block 11 on the ROE is “Last day for which paid.” Service Canada instructs employers to enter the last day for which the employee received insurable earnings. This date usually coincides with the last day of work, unless the employee continues to receive insurable earnings after the last day worked (for example, paid leave like vacation/sick leave or salary continuance).

In Tanya’s case, she gave notice on April 2, but her resignation is effective April 27. There’s no information indicating paid leave after April 27 or salary continuance. So Block 11 should be April 27 (the last day she worked/received insurable earnings).

The question also mentions the pay period ending April 28—that date belongs in Block 12 (Final pay period ending date), which is the end date of the final pay period that includes the Block 11 date, and is often different from Block 11.