The engagement letter covers certain subjects which generally are required to be discussed by either your professional association or your insurance company. Remember that the purpose of the letter is to have the client agree, BEFORE you start work, that they have asked you to do work and that they will pay. You may always choose not to use the letter, but then you run the risk of clients asking you to do work, but walking away and not paying.
Should you not like the default text, you can discuss the matter with your professional association and/or your insurance company to determine what may be removed.
Should either refuse to reduce the letter, your alternative option is to change the font size so that the entire letter appears on one page.
I have an entirely difference engagement letter than provided and maintain several others outside of TaxCycle given that the situations appear only rarely. But, the engagement letter serves to “nail down” that my client asked me and agreed to pay me. The rest is window dressing and setting of terms.