Interesting point (snag) re investing in bonds. That is when you sell them you have to fill out IRD form IR3K. The second question is

"Print the total amount of interest you received during the
time you held this investment in Box 2. Include any interest
received in the year of sale or maturity."

Now if you have held something like WKSHA from the start about 16 years ago, paying a variable amount every year you are in for a lot of tedious searching. And quite pointless too because question 5 then asks you to

"Print the total amount of interest you have included in
previous tax returns in Box 5."

And question 7 then essentially asks you to subtract Q5 from Q2 leaving the interest received in the current year!