| Oct 10, 2020 | Filing and payment | BIR Form 1601C (Non-eFPS Filers) |
| Oct 11, 2020 | e-Filing | BIR Form 1601C (eFPS Group E) |
| Oct 12, 2020 | e-Filing | BIR Form 1601C (eFPS Group D) |
| Oct 13, 2020 | e-Filing | BIR Form 1601C (eFPS Group C) |
| Oct 14, 2020 | e-Filing | BIR Form 1601C (eFPS Group B) |
| Oct 15, 2020 | e-Filing | BIR Form 1601C (eFPS Group A) |
| e-Payment | BIR Form 1601C (all eFPS Filers) |
| Oct 25, 2020 | e-Filing / Filing | BIR Forms 2551Q or 2550Q (eFPS and Non-eFPS Filers ) |
| e-Payment / Payment | BIR Forms 2551Q or 2550Q (eFPS and Non-eFPS Filers ) |
| eSubmission | Quarterly Summary List of Sales and Purchases (SLSP) |
| Oct 31, 2020 | e-Filing / Filing | BIR Forms 1601EQ and/or 1601FQ (eFPS and Non-eFPS Filers ) |
| e-Payment / Payment | BIR Forms 1601EQ and/or 1601FQ (eFPS and Non-eFPS Filers ) |
| eSubmission | of Quarterly Alphalist of Payees (QAP) |
