Hi
Yes, those tax months/periods are correct. You may find this guidance page useful as it illustrates what tax periods/numbers to add to your payment reference when paying HMRC:
Pay employers' PAYE. Please note, if you are paying your employees on a quarterly basis and do not pay any employees for full tax months within that quarter, you will still need to complete EPS to report a period of no payments. For example, you pay your employees in tax month 3 - you will need to send an EPS (period of no payments) for months 1 & 2 and then send your FPS in month 3.