It’s important we don’t delay any acts of worship that can get us closer to ALLAH. Those who missed any days in Ramadhan should start fasting now without delaying it unless with genuine reasons to delay it.
Those who doesn’t owe any days should start fasting the 6 recommended days in this month Shawwaal.
The Prophet (peace and blessings of ALLAH be upon him) explained this when he said: “Whoever fasts for six days after (Eid) al-Fitr has completed the year: (whoever does a good deed will have ten hasanah like it).”
Even though its permissible to fast these 6 special days within Shawwal then complete your missed days of Ramadhan within the year, its highly recommended we don’t delay any act of worship as you don’t know if you will be living to _So the best is to quickly fast all your missed days then add the 6th shawwal and if you didn’t miss any day in Ramadhan then fast all your 6 days then continue with Mondays and Thursday and also the recommended 3 middle days of each month 13th, 14th and 15th and all these add up to making you a good servant of ALLAH be-iznilLah.
_May ALLAH aid us in our efforts to please HIM_. Aameen.