Informed sources told The Daily Mail on Friday that the Duke of Sussex has a "packed" diary of meetings at the beginning of next week and an official engagement at the Buckingham Palace on January 16.
It could be his last as a working royal, depending on how negotiations with the rest of the royal family go.
After that he was expected to fly back to Canada, where his wife is with their eight-month-old son, Archie, and their two dogs.
This could come as early as next weekend, and will certainly be within two weeks, added the sources.
It was understood that Meghan, who left the country on Thursday, does not have a return flight booked back to London.
Sources confirmed to The Daily Mail there were no official engagements in her diary for the "foreseeable future".
The couple have been living in a luxury property on Vancouver Island.
Archie was left there with his nanny and Meghan's best friend, Toronto-based stylist Jessica Mulroney, and her family while the Sussexes flew back to London together on Monday.
On Wednesday night, the Duke and Duchess of Sussex said that they would be "stepping back" as senior royals, adding that they wanted to become financially independent and would divide their time between the UK and North America.
But the Queen and other members of the family were said to be "hurt" by their decision, said metro.co.uk.
It was also reported that Harry and Meghan reportedly ignored instructions from the Queen not to go public with their announcement.
According to the Evening Standard, Harry's father Prince Charles and the his brother William, the Duke of Cambridge only received the statement 10 minutes before it was released.
( With inputs from IANS )