Tortle monk

Does a tortle monk get to add it's wisdom modifier to its natural armor class? Monks get base 10 + dex mod + wish mod, and a tortle gets base 17 shell with no dex

So it's a coding issue. The Tortle's AC is set in the back end by setting their DEX AC bonus to 0, then adding 7 to the current defense (10+7=17). The WIS score is still being added, but even if you have 20 WIS, your AC will only be set to 15 (10+5(WIS)+0(DEX)).  I set up a character and made his WIS score 30 to test it, and his AC did change to the higher 20. So I fixed it with a homebrew race (Dragon Tortle). In the modifier's screen, select the "Modifier Type" to be "SET", then select "Modifier Subtype" as "Minimum Base Armor". Finally, change the "Fixed Value" to 17 or whatever you want. If you're editing the Tortle to create this, you also need to delete the other modifiers that are already there.

Quote from Theleolabinn >>

Does a tortle monk get to add it's wisdom modifier to its natural armor class? Monks get base 10 + dex mod + wish mod, and a tortle gets base 17 shell with no dex

 No: the Tortle and the Monk grant two different ways of calculating the AC and you have to choose between them. They don’t combine. 

Relevant rule:

Armor Class

If you have multiple ways to calculate your Armor Class, you can benefit from only one at a time. For example, a Monk/Sorcerer with a Monk’s Unarmored Defense feature and a Sorcerer’s Draconic Resilience feature must choose only one of those features as a way to calculate Armor Class

The Tortle's AC is set in the back end by setting their DEX AC bonus to 0, then adding 7 to the current defense (10+7=17). 

I disagree with that calculation. The Tortle AC is 17.  Period.   There is no way to know if it is 10+7.  One can assume a calculation like that  but not sure their is something like that.  As you don't know how do you justify adding WIS bonus to 17?

Quote from Character77006 >>

The Tortle's AC is set in the back end by setting their DEX AC bonus to 0, then adding 7 to the current defense (10+7=17). 

 

I disagree with that calculation. The Tortle AC is 17.  Period.   There is no way to know if it is 10+7.  One can assume a calculation like that  but not sure their is something like that.  As you don't know how do you justify adding WIS bonus to 17?

They're discussing how the Tortle's AC may have been implemented internally in the D&D Beyond character creator, not how the rules say it actually works.