The 24 year old was killed following a freak traffic accident in Australia on Monday week last.
A huge outpouring of grief in recent days across the county highlighted how well Tomas was thought of by his many friends across Donegal.
The well-known GAA player’s remains are expected to arrive at Belfast International Airport tomorrow afternoon.
He will be waked at his family home at Glenview Park before funeral mass at the Church of the Holy Family at 2pm on Sunday.
Tributes have flowed in for Tomas in recent days from Australia to Boston where Tomas played club football for a time.
It is also now expected that a minute’s silence will be observed at Saturday’s Ulster Championship clash between Donegal and Derry at MacCumhaill Park.
Tomas was a hugely talented GAA player and Jim McGuinness had approached Tomas with a view to him joining the county panel.
As well as being a talented GAA player, Tomas was also a keen soccer player and lined out with Eany Celtic.