Inzamam gave evidence to an International Cricket Council (ICC) code of conduct hearing at The Oval on Wednesday, convened after Pakistan refused to take the field after tea on the fourth day of the fourth Test played at the same venue (The Oval).
The protest followed a decision by umpires Darrell Hair and Billy Doctrove to penalise Pakistan five runs and change the ball for alleged ball tampering.
In a statement on Wednesday the ICC said the hearing heard evidence from 11 witnesses, including Inzamam and both umpires.
It said submissions would be made by legal representatives from both sides today and adjudicator Ranjan Madugalle would then retire to make his decision.
''It is anticipated the adjudicator will reach his decision at some stage on Thursady,'' the statement said.
If found guilty of ball-tampering, Inzy faces a fine of between 50 and 100% of his match fee and could also be banned for a Test or two ODIs. On the second charge, a ban of between two and four Tests or four to eight ODIs is possible.