From Longman Business Dictionary
avoida·void /əˈvɔɪd/ verb [transitiveT]TAXLAW if you avoid tax, you manage to not pay it legally, for example by the way that you enter profits or losses into your accountsInvesting in this way allows savers to avoid tax upon withdrawal.
→ compare evade —avoidance noun [uncountableU]There is a very thin line between tax avoidance and tax evasion.