Your deduction is equal to the result of the following calculation: Add the deductions you are claiming on lines 105, 205 and 207 for income entitling you to the deduction for foreign researchers on a post-doctoral internship. Multiply the total by the exemption rate shown in box A-14 of your RL-1 slip. Subtract the result from the amount shown in box A-11 of your RL-1 slip.