Step 1: Calculate the tax for last year (Rs. 22000).
For last year, the income is Rs. 22000. According to the tax slab, income between Rs. 20000 to Rs. 30000 is taxed as:
\[
\text{Tax} = 750 + 8\% \text{ of income over } 20000
\]
Income over Rs. 20000 is Rs. 22000 - Rs. 20000 = Rs. 2000. So:
\[
\text{Tax} = 750 + 0.08 \times 2000 = 750 + 160 = 910
\]
So, the tax last year is Rs. 910.
Step 2: Calculate the tax for this year (Rs. 34200).
For this year, the income is Rs. 34200. According to the tax slab, income between Rs. 30000 to Rs. 50000 is taxed as:
\[
\text{Tax} = 1550 + 10\% \text{ of income over } 30000
\]
Income over Rs. 30000 is Rs. 34200 - Rs. 30000 = Rs. 4200. So:
\[
\text{Tax} = 1550 + 0.10 \times 4200 = 1550 + 420 = 1970
\]
So, the tax this year is Rs. 1970.
Step 3: Calculate the additional tax to be paid this year.
The additional tax is:
\[
\text{Additional tax} = 1970 - 910 = 1060
\]
So, the additional tax to be paid this year is Rs. 1060.