Most companies need to keep statutory registers and key resolutions up to date, prepare financial statements, file corporate tax with IRAS for each Year of Assessment, and file the Annual Return with ACRA. The exact steps and timelines depend on your financial year end (FYE) and whether you qualify for simplifications (for example, AGM-related exemptions). The practical rule is to treat it as a yearly cycle with monthly housekeeping, not a one-month rush.