Wash sales cancel out an equal number of shares. You didn't say how many shares you have in taxable, that have a -$2,000 loss. But if you bought 4 shares in your IRA, you'd use all but 4 shares of VTIAX in taxable to calculate your losses.
Normally you'd add the value of the wash sale to the "cost basis" of the new shares. What kind of IRA is involved? Since Roth IRAs never get taxed again, I think any increase in cost basis has no effect. But you might have a future benefit if a Traditional IRA is involved.